CN213124354U

CN213124354U - Novel flash barrier

Info

Publication number: CN213124354U
Application number: CN202021970915.2U
Authority: CN
Inventors: 胡长玉; 南斌雷; 吴文豪; 余旭宇
Original assignee: Yueqing Fulde Electric Co ltd
Current assignee: Yueqing Fulde Electric Co ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-05-04
Anticipated expiration: 2030-09-10

Abstract

The utility model discloses a novel flash barrier, the structure of which comprises an arc extinguish chamber, a plurality of arc discharge channels are arranged at intervals in the arc extinguish chamber, an open end at one side of the arc extinguish chamber is provided with an upper flash barrier and a lower flash barrier, the lower surface of the upper flash barrier and the upper surface of the lower flash barrier are both provided with a plurality of arc striking grooves which are arranged at intervals along the arc inlet direction of the flash barrier; the lower surface of the upper arc isolating plate and the upper surface of the lower arc isolating plate are also provided with arc striking pieces, and the arc striking pieces are arranged close to the opening end of the arc extinguishing chamber; and a static contact mounting part is arranged between the upper arc-isolating plate and the lower arc-isolating plate, and a static contact is connected to the static contact mounting part.

Description

Novel flash barrier

Technical Field

The utility model relates to a low-voltage apparatus field, more specifically say, it relates to a novel flash barrier.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. When the circuit breaker breaks open the circuit, can produce electric arc between the sound contact of circuit breaker, electric arc brings a large amount of heats, if electric arc dwell time overlength is probably to burn the circuit breaker between sound contact, consequently need be as fast as possible to introduce the electric arc into the arc extinguish chamber and extinguish it. In the existing small-sized circuit breaker, an arc extinguishing system comprises an arc extinguishing chamber, and an arc isolating plate is arranged between the arc extinguishing chamber and a moving contact and a static contact for arc striking, although a certain effect is achieved, most of the existing arc isolating plates are flat-plate type arc isolating plates, generally only gas generation and insulation effects are considered, and the problems of paths and speeds of electric arcs are not considered, so that the arc extinguishing effect is not ideal.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a novel flash barrier, the unique structural design of this subassembly flash barrier can accelerate the electric arc motion and prevent the electric arc backward flow, is favorable to lengthening electric arc and makes electric arc get into the explosion chamber fast to improve product arc extinguishing efficiency and safety in utilization.

In order to achieve the above purpose, the utility model provides a following technical scheme: a novel arc baffle comprises an arc extinguish chamber, wherein a plurality of arc discharge channels are arranged in the arc extinguish chamber at intervals, an upper arc baffle and a lower arc baffle are arranged at the opening end of one side of the arc extinguish chamber, and a plurality of arc ignition grooves which are arranged at intervals along the arc inlet direction of the arc baffle are arranged on the lower surface of the upper arc baffle and the upper surface of the lower arc baffle; the lower surface of the upper arc isolating plate and the upper surface of the lower arc isolating plate are also provided with arc striking pieces, and the arc striking pieces are arranged close to the opening end of the arc extinguishing chamber; and a static contact mounting part is arranged between the upper arc-isolating plate and the lower arc-isolating plate, and a static contact is connected to the static contact mounting part.

The scheme has the advantages that: the creepage distance of electric arc can be increased through the design of striking groove, and electric arc moves towards the explosion chamber direction after the striking groove and arrives the striking piece, and the striking piece sets up and is being close to the explosion chamber open end, can play the effect of accelerating the electric arc motion and preventing the electric arc backward flow through the design of striking piece, further strengthens the arc extinguishing effect.

The utility model discloses further set up to: every striking groove all is the slant setting and the left end is higher than the right-hand member, and the open end that the explosion chamber was kept away from to the left end in striking groove near the open end, the right-hand member of explosion chamber.

The scheme has the advantages that: the slant of arc striking groove sets up can further increase the creepage distance of electric arc.

The utility model discloses further set up to: the arc striking piece is designed to be an inclined plane, one end, far away from the arc extinguishing chamber, of the arc striking piece is an inclined plane starting end, the inclined plane starting end of the arc striking piece and the lower surface of the upper arc isolating plate or the upper surface of the lower arc isolating plate are the same horizontal plane, the arc striking piece and the arc striking grooves are distributed alternately, and each arc striking groove is located between every two adjacent arc striking pieces.

The scheme has the advantages that: the inclined plane design of the arc striking piece can play a role in accelerating the movement of electric arcs and preventing the backflow of the electric arcs, and meanwhile, the arc striking piece and the arc striking groove are alternately distributed, so that the electric arcs are staggered, the path of the electric arcs is changed, and the arc striking piece is favorable for lengthening the electric arcs so that the electric arcs can quickly enter an arc extinguishing chamber.

The utility model discloses further set up to: the static contact installed part is including the installation department that is used for installing the static contact, the grafting portion that is used for realizing the grafting installation with the assembly body, and the installation department is "U" type structure of buckling, and grafting portion has the inserted block of longitudinal symmetry.

The scheme has the advantages that: the U-shaped bending structure of the installation part of the static contact installation part for installing the static contact can realize the arc striking effect during breaking, the electric arc is quickly led into the arc extinguish chamber, and the insertion blocks which are vertically symmetrical through the insertion part are convenient for the connection between the static contact installation part and the assembly body

The utility model discloses further set up to: the upper flash barrier and the lower flash barrier are respectively provided with an installation positioning hole for installing the flash barrier.

The scheme has the advantages that: when the arc isolation plate is required to be installed, the position of the arc isolation plate can be limited through the installation positioning hole, so that the arc isolation plate is prevented from shifting or falling off in the working process, the effect on the arc isolation effect of a product is avoided, and the use stability of the product is favorably enhanced.

The utility model discloses further set up to: the end face edges of the upper surface of the upper arc-isolating plate and the lower surface of the lower arc-isolating plate are respectively provided with a convex edge, a containing cavity is formed between the convex edges, and the containing cavity is matched with the size of the magnetic conductive sheet.

The scheme has the advantages that: when the magnetic conductive plate needs to be installed, the magnetic conductive plate is placed in the magnetic conductive plate accommodating cavity, the accommodating cavity has a limiting effect on the position of the magnetic conductive plate, and therefore the phenomenon that the magnetic conductive plate drops or changes position in the using process to influence the arc isolating effect of the arc isolating plate is avoided, the arc isolating capacity of the arc isolating plate is improved, and the arc extinguishing effect of a product is guaranteed.

The utility model discloses further set up to: the upper surface of the upper flash barrier and the lower surface of the lower flash barrier are both provided with magnetic conductive sheet positioning columns.

The scheme has the advantages that: the installation of the magnetic conduction sheet is more stable through the magnetic conduction sheet positioning column.

To sum up, the utility model discloses following beneficial effect has: the creepage distance of the electric arc can be increased through the design of the arc striking groove, and the arc extinguishing effect of the product is enhanced; electric arc moves towards the explosion chamber after passing through the arc striking groove and reaches the arc striking piece, and the inclined plane design through the arc striking piece can play the effect of accelerating the electric arc motion and preventing the electric arc from flowing back, further strengthens the arc extinguishing effect. The structural design of each functional component on the flash barrier is simple, the processing is convenient, and the installation is convenient and stable; the arc striking and extinguishing speed of the arc isolating plate is high, the arc extinguishing time is short, the contact cannot be greatly ablated, the short-circuit breaking capacity of a product is remarkably improved, and the service life of the product is prolonged.

Drawings

FIG. 1 is a schematic perspective view of a novel flash barrier;

FIG. 2 is a top view of the novel flash barrier;

FIG. 3 is a side view of the novel flash barrier;

FIG. 4 is a schematic structural view of an upper flash barrier of the novel flash barrier;

FIG. 5 is a schematic view of the structure of the lower flash barrier of the novel flash barrier;

FIG. 6 is a schematic structural view of a cavity for accommodating a novel lower flash barrier;

fig. 7 is a schematic structural view of a novel static contact mounting part of an arc baffle.

Reference numerals: 1. an arc extinguishing chamber; 101. an arc discharge channel; 2. an upper flash barrier; 201. a lower flash barrier; 202. an arc striking groove; 203. an arc striking member; 204. installing a positioning hole; 205. a convex edge; 206. an accommodating cavity; 207. a magnetic conductive sheet; 208. a magnetic conductive sheet positioning column; 3. a static contact mounting part; 301. static contact; 302. an installation part; 303. a plug-in part; 304. and (5) inserting the blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, a novel arc barrier according to an embodiment of the present invention includes an arc extinguish chamber 1, a plurality of arc discharge channels 101 are arranged at intervals in the arc extinguish chamber 1, an open end of one side of the arc extinguish chamber 1 is provided with an upper arc barrier 2 and a lower arc barrier 201, and a plurality of arc ignition grooves 202 are arranged at intervals along an arc entering direction of the arc barrier on a lower surface of the upper arc barrier 2 and an upper surface of the lower arc barrier 201; the lower surface of the upper arc-isolating plate 2 and the upper surface of the lower arc-isolating plate 201 are also provided with an arc striking piece 203, and the arc striking piece 203 is arranged close to the opening end of the arc extinguishing chamber 1; and a static contact mounting part 3 is arranged between the upper arc-isolating plate 2 and the lower arc-isolating plate 201, and a static contact 301 is connected to the static contact mounting part 3. When the static contact mounting piece is used, the upper arc-isolating plate 2 and the lower arc-isolating plate 201 are respectively arranged above and below the static contact mounting piece 3, an arc inlet channel is formed between the upper arc-isolating plate 2 and the lower arc-isolating plate 201, the arc-extinguishing chamber 1 is arranged on the left side, and when an arc passes through the arc inlet channel, because the lower surface of the upper arc-isolating plate 2 and the upper surface of the lower arc-isolating plate 201 are respectively provided with a plurality of arc-leading grooves 202 which are arranged at intervals along the arc inlet direction of the arc-isolating plates, the creepage distance of the arc can be increased through the design of the arc-leading grooves 202, and the arc-; electric arc moves towards explosion chamber 1 direction after the arc process draws the arc groove 202 and reaches striking piece 203, because the lower surface of last flash barrier 2, the upper surface of lower flash barrier 201 are equipped with striking piece 203, and striking piece 203 sets up near explosion chamber 1 open end simultaneously, can play the effect of accelerating electric arc motion and preventing the electric arc backward flow through the design of striking piece 203, further strengthens the arc extinguishing effect.

Every striking groove 202 all is the slant setting and the left end is higher than the right-hand member, and the open end that the open end of explosion chamber 1 was kept away from to the left end, the right-hand member that arc striking groove 202 was close to explosion chamber 1. When the arc-striking plate is used, when the arc moves along the arc-striking direction of the arc-striking plate, the arc-striking groove 202 is obliquely arranged, so that the creepage distance of the arc can be further increased.

The arc striking piece 203 is designed to be an inclined plane, one end, far away from the arc extinguishing chamber 1, of the arc striking piece 203 is an inclined plane starting end, the inclined plane starting end of the arc striking piece 203 and the lower surface of the upper arc isolating plate 2 or the upper surface of the lower arc isolating plate 201 are in the same horizontal plane, the arc striking piece 203 and the arc striking grooves 202 are distributed alternately, and each arc striking groove 202 is located between the adjacent arc striking pieces 203. When the arc extinguishing chamber is used, when an arc flows through the alternating positions of the arc striking piece 203 and the arc striking groove 202, the inclined plane design of the arc striking piece 203 can play a role in accelerating the arc movement and preventing the arc from flowing back, and meanwhile, the arc striking piece 203 and the arc striking groove 202 adopt the design of alternating distribution, so that the arc is staggered, the arc path is changed, and the arc can rapidly enter the arc extinguishing chamber 1 due to the fact that the arc is lengthened.

The static contact mounting part 3 comprises a mounting part 302 for mounting a static contact 301 and an inserting part 303 for realizing inserting and mounting with an assembly body, wherein the mounting part 302 is of a U-shaped bending structure, and the inserting part 303 is provided with inserting blocks 304 which are symmetrical up and down. When the breaker is used for breaking a power grid, the U-shaped bending structure of the mounting part 302 of the static contact mounting part 3 for mounting the static contact 301 can realize arc striking during breaking, electric arcs are quickly led into the arc extinguish chamber 1, and the static contact mounting part 3 and the assembly body are conveniently connected through the insertion blocks 304 which are vertically symmetrical through the insertion part 303.

The upper arc isolating plate 2 and the lower arc isolating plate 201 are both provided with installation positioning holes 204 for installing the arc isolating plates. When using, when needs are installed the flash barrier, can more efficient realize injecing the position of flash barrier through installation locating hole 204, thereby avoid the flash barrier to take place to shift or drop and cause the influence to the flash barrier effect of product in the course of the work, be favorable to strengthening the arc extinguishing effect of product.

Convex edges 205 are arranged on the upper surface of the upper arc baffle 2 and the end surface edges of the lower surface of the lower arc baffle 201, an accommodating cavity 206 is formed between the convex edges 205, and the accommodating cavity 206 is matched with the magnetic conductive sheet 207 in size. When using, form holding chamber 206 between chimb 205 and the flash barrier base that the upper surface at last flash barrier 2, the terminal surface edge of the lower surface of lower flash barrier 201 set up, when needs are installed magnetic conduction piece 207, place magnetic conduction piece 207 in holding chamber 206, chimb 205 has limiting displacement to magnetic conduction piece 207's position, thereby avoid in the use that the drop of magnetic conduction piece 207 or take place the position and change the flash barrier effect that influences the flash barrier, improve the flash barrier's flash barrier, guarantee the arc extinguishing effect of product.

The upper surface of the upper arc-isolating plate 2 and the lower surface of the lower arc-isolating plate 201 are both provided with magnetic-conducting sheet positioning columns 208. When the installation structure is used, when the magnetic conductive sheet 207 needs to be installed, the magnetic conductive sheet 207 is placed in the accommodating cavity 206, the magnetic conductive sheet positioning column 208 penetrates through the magnetic conductive sheet 207 to limit the position of the magnetic conductive sheet 207, and the installation of the magnetic conductive sheet 207 is more stable through the magnetic conductive sheet positioning column 208.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a novel flash barrier, including explosion chamber (1), its characterized in that: a plurality of arc discharge channels (101) are arranged in the arc extinguish chamber (1) at intervals, an upper arc isolation plate (2) and a lower arc isolation plate (201) are arranged at the opening end of one side of the arc extinguish chamber (1), and a plurality of arc ignition grooves (202) which are arranged at intervals along the arc inlet direction of the arc isolation plates are arranged on the lower surface of the upper arc isolation plate (2) and the upper surface of the lower arc isolation plate (201); the lower surface of the upper arc isolating plate (2) and the upper surface of the lower arc isolating plate (201) are also provided with an arc striking piece (203), and the arc striking piece (203) is arranged close to the opening end of the arc extinguishing chamber (1); and a static contact mounting part (3) is arranged between the upper arc-isolating plate (2) and the lower arc-isolating plate (201), and a static contact (301) is connected to the static contact mounting part (3).

2. The novel flash barrier of claim 1, wherein: every arc ignition groove (202) all are the slant and set up and the left end is higher than the right-hand member, the open end that arc ignition groove (202) were kept away from explosion chamber (1) is close to open end, the right-hand member of explosion chamber (1) to the left end of arc ignition groove (202).

3. The novel flash barrier of claim 1, wherein: the arc striking piece (203) is designed to be an inclined plane, one end, far away from the arc extinguishing chamber (1), of the arc striking piece (203) is an inclined plane starting end, the inclined plane starting end of the arc striking piece (203) and the lower surface of the upper arc isolating plate (2) or the upper surface of the lower arc isolating plate (201) are on the same horizontal plane, the arc striking piece (203) and the arc striking grooves (202) are alternately distributed, and each arc striking groove (202) is located between the adjacent arc striking pieces (203) respectively.

4. The novel flash barrier of claim 1, wherein: the static contact mounting piece (3) comprises a mounting portion (302) for mounting a static contact (301) and an inserting portion (303) for realizing inserting and mounting with an assembly body, the mounting portion (302) is of a U-shaped bending structure, and the inserting portion (303) is provided with inserting blocks (304) which are symmetrical up and down.

5. The novel flash barrier of claim 1, wherein: and the upper arc isolating plate (2) and the lower arc isolating plate (201) are respectively provided with an installation positioning hole (204) for installing the arc isolating plates.

6. The novel flash barrier of claim 1, wherein: go up the terminal surface edge of the upper surface of flash barrier (2), the lower surface of flash barrier (201) down and all be equipped with chimb (205), form holding chamber (206) between chimb (205), the size looks adaptation of holding chamber (206) and magnetic conduction piece (207).

7. The novel flash barrier of claim 1, wherein: and magnetic conductive sheet positioning columns (208) are arranged on the upper surface of the upper arc-isolating plate (2) and the lower surface of the lower arc-isolating plate (201).